Ostomy system

Abstract

An ostomy system for receiving bodily waste comprises a drainage bag ( 200 ) and a filter ( 100 ) comprising an open-cell foam ( 102 ) for preventing liquid and solid particles from passing from the drainage bag to its surroundings. The foam defines a passageway for releasing flatus gasses from the drainage bag to its surroundings, and at least a portion of the foam is arranged at a folding line defined by the drainage bag during use thereof. The foam may be a open-cell foam ( 102 ) embedded in a closed-cell foam ( 128 ) in a filter flange 146 . A gas permeable hydrophobic membrane ( 127 ) may be provided at an outlet of the open-cell foam ( 102 ). The surroundings of the drainage bag ( 200 ) may be constituted by the interior of an outer bag.

The invention claimed is: 
     
       1. An ostomy system for receiving bodily waste, comprising:
 a drainage bag; 
 a coupling system configured to secure the drainage bag to a stoma of a user; 
 a filter comprising a foam positioned at least at a filter inlet to prevent liquid and solid particles from passing from the drainage bag to its surroundings, the foam defining a passageway for releasing flatus gasses from the drainage bag to the surroundings; 
 wherein the filter is pre-folded and has a folding line that intersects the filter inlet of the filter, and the filter is integrated with the coupling system such that the filter inlet of the filter is inside the drainage bag and folding/unfolding the filter about the folding line moves the foam to displace faeces away from the filter inlet of the filter. 
 
     
     
       2. An ostomy system according to  claim 1 , wherein the folding line intersects the filter at a distance from the filter inlet. 
     
     
       3. An ostomy system according to  claim 1 , wherein the filter is arranged between the coupling system and the drainage bag. 
     
     
       4. An ostomy system according to  claim 1 , wherein the drainage bag is impermeable to flatus gasses. 
     
     
       5. An ostomy system according to  claim 3 , wherein said surroundings of the drainage bag comprise an outer bag that is secured in relation to the user's body and in relation to the drainage bag by means of said coupling system. 
     
     
       6. An ostomy system according to  claim 5 , wherein the outer bag is fabricated from a material that is impermeable to flatus gasses and comprises an outlet with a flatus filter for releasing flatus gasses from the outer bag. 
     
     
       7. An ostomy system according to  claim 1 , wherein said passageway further extends through a gas permeable membrane. 
     
     
       8. An ostomy system according to  claim 1 , wherein the filter comprises a filter flange, and wherein the drainage bag is connected to a first surface of the filter flange along an attachment zone, and wherein the coupling system is connected to the filter flange along a contact area, whereby said attachment zone is radially displaced with respect to said contact area. 
     
     
       9. An ostomy system according to  claim 1 , wherein the foam is an open-cell foam, and wherein the filter comprises a filter flange, in which the open cell foam is supported by a closed-cell foam. 
     
     
       10. An ostomy system according to  claim 1 , wherein the drainage bag is of a structure which essentially maintains its physical integrity upon immersion in water. 
     
     
       11. An ostomy system according to  claim 1 , wherein the coupling system comprises means for forcing the flow of flatus gasses along a predetermined passageway. 
     
     
       12. An ostomy system according to  claim 1 , wherein the filter is closer to the coupling system than the filter is to the drainage bag. 
     
     
       13. A kit of parts comprising:
 an ostomy system for receiving bodily waste including:
 a drainage bag; 
 a coupling system configured to secure the drainage bag to a stoma of a user; 
 a filter comprising a foam positioned at least at a filter inlet of the filter to prevent liquid and solid particles from exiting the drainage bag, the foam defining a passageway for releasing flatus gasses from the drainage bag; 
 wherein the filter is integrated with the coupling system such that the filter inlet of the filter is inside the drainage bag; and 
 
 a set of instructions instructing a user how to provide the drainage bag with a folding line prior to attachment of the ostomy system to the body; 
 wherein folding/unfolding of the filter about the folding line is adapted to move the foam to displace faeces away from the filter inlet of the filter.